Just thought a little, testing acids is not very scientific, really, because acid just walking around and activates the strips. It really does not use all that antibody stuff "specific to antigen" at all. This will only show that you could make your salina acidic to get a positive result.
More interesting to find some substance that will react with "specific antibodies" and show strips as intended. AFAIK, shrimps have allergen that is antigen to IgG antibody. The IgG antibodies also declared as antibodies to SARS-CoV-2 N protein. May be test srimp juice? It is not acidic and humans could easily eat shrimps before test.
Just thought a little, testing acids is not very scientific, really, because acid just walking around and activates the strips. It really does not use all that antibody stuff "specific to antigen" at all. This will only show that you could make your salina acidic to get a positive result.
More interesting to find some substance that will react with "specific antibodies" and show strips as intended. AFAIK, shrimps have allergen that is antigen to IgG antibody. The IgG antibodies also declared as antibodies to SARS-CoV-2 N protein. May be test srimp juice? It is not acidic and humans could easily eat shrimps before test.
Quickly found something to think about - https://fortune.com/2020/07/10/coronavirus-in-food-china-shrimp/
:)
Check "shrimps tested covid" in search engines. Quite a lot of results.